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<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  
</body>
</html>

<script>
// 冒泡排序
var arr = [999, 888, 111];

// for (var i = 0; i < arr.length; i++) {
//   for (var j = 0; j < arr.length - i - 1; j++) {
//     if (arr[j] > arr[j + 1]) {
//       var temp = arr[j];
//       arr[j] = arr[j + 1];
//       arr[j + 1] = temp;
//     }
//   }
// }

function bubbleSort(arr) {
  for (var i = 0; i < arr.length; i++) {
    for (var j = 0; j < arr.length - i - 1; j++) {
      if (arr[j] > arr[j + 1]) {
        var temp = arr[j];
        arr[j] = arr[j + 1];
        arr[j + 1] = temp;
      }
    }
  }

  return arr;
}

console.log(bubbleSort([999, 888, 111, 888, 111,1,2,3]));

</script>